Question

find square of 399 using the identity a-b²=a²+b²-2ab​

Answer 1

Answer:

$•°• \: {(399)}^{2} = 801$

Step-by-step explanation:

$= {(399)}^{2}$

$= {(400 - 1)}^{2}$

$= {(400)}^{2} - 2(400)(1) + {(1)}^{2}$

$= 1600 - 800 + 1$

$= 1600 - 799$

$= 801$

Adiós! Hope this helps you.

Answer 2

Answer:

151999

using the above mentioned identity